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Analog Devices Semiconductor Electronic Components Datasheet

AD1861 Datasheet

16-Bit/18-Bit/ 16 X Fs PCM Audio DACs

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AD1861 pdf
a
16-Bit/18-Bit, 16 ؋ FS
PCM Audio DACs
FEATURES
110 dB SNR
Fast Settling Permits 16؋ Oversampling
؎3 V Output
Optional Trim Allows Super-Linear Performance
؎5 V Operation
16-Pin Plastic DIP and SOIC Packages
Pin-Compatible with AD1856 & AD1860 Audio DACs
2s Complement, Serial Input
APPLICATIONS
High-End Compact Disc Players
Digital Audio Amplifiers
DAT Recorders and Players
Synthesizers and Keyboards
PRODUCT DESCRIPTION
The AD1851/AD1861 is a monolithic PCM audio DAC. The
AD1851 is a 16-bit device, while the AD1861 is an 18-bit de-
vice. Each device provides a voltage output amplifier, DAC,
serial-to-parallel register and voltage reference. The digital por-
tion of the AD1851/AD1861 is fabricated with CMOS logic
elements that are provided by Analog Devices’ 2 µm ABCMOS
process. The analog portion of the AD1851/AD1861 is fabri-
cated with bipolar and MOS devices as well as thin-film
resistors.
This combination of circuit elements, as well as careful design
and layout techniques, results in high performance audio play-
back. Laser-trimming of the linearity error affords low total har-
monic distortion. An optional linearity trim pin is provided to
allow residual differential linearity error at midscale to be elimi-
nated. This feature is particularly valuable for low distortion
reproductions of low amplitude signals. Output glitch is also
small, contributing to the overall high level of performance. The
output amplifier achieves fast settling and high slew rates, pro-
viding a full ± 3 V signal at load currents up to 8 mA. When
used in current output mode, the AD1851/AD1861 provides a
± 1 mA output signal. The output amplifier is short circuit
protected and can withstand indefinite shorts to ground.
The serial input interface consists of the clock, data and latch
enable pins. The serial 2s complement data word is clocked into
the DAC, MSB first, by the external clock. The latch enable
signal transfers the input word from the internal serial input
register to the parallel DAC input register. The AD1851 input
clock can support a 12.5 MHz data rate, while the AD1861 in-
put clock can support a 13.5 MHz data rate. This serial input
port is compatible with second generation digital filter chips
used in consumer audio products. These filters operate at over-
sampling rates of 2ϫ, 4ϫ, 8ϫ and 16ϫ sampling frequencies.
AD1851/AD1861
FUNCTIONAL BLOCK DIAGRAM
–VS 1
DGND 2
+VL 3
NC 4
CLK 5
LE 6
LATCH
DAC
SERIAL
INPUT
REGISTER
CONTROL
LOGIC
IOUT
DATA 7
NC 8
AD1851/
AD1861
NC = NO CONNECT
16 +VS
15 TRIM
14 MSB ADJ
13 IOUT
12 AGND
11 SJ
10 RF
9 VOUT
The critical specifications of THD+N and signal-to-noise ratio
are 100% tested for all devices.
The AD1851/AD1861 operates with ± 5 V power supplies, mak-
ing it suitable for home use markets. The digital supply, VL, can
be separated from the analog supplies, VS and –VS, for reduced
digital crosstalk. Separate analog and digital ground pins are
also provided. Power dissipation is 100 mW typical.
The AD1851/AD1861 is available in either a 16-pin plastic DIP
or a 16-pin plastic SOIC package. Both packages incorporate
the industry standard pinout found on the AD1856 and
AD1860 PCM audio DACs. As a result, the AD1851/AD1861
is a drop-in replacement for designs where ± 5 V supplies have
been used with the AD1856/AD1860. Operation is guaranteed
over the temperature range of –25°C to +70°C and over the
voltage supply range of ± 4.75 V to ± 5.25 V.
PRODUCT HIGHLIGHTS
l. AD1851 16-bit resolution provides 96 dB dynamic range.
AD1861 18-bit resolution provides 108 dB dynamic range.
2. No external components are required.
3. Operates with ± 5 V supplies.
4. Space saving 16-pin SOIC and plastic DIP packages.
5. 100 mW power dissipation.
6. High input clock data rates and 1.5 µs settling time permits
2ϫ, 4ϫ, 8ϫ and 16ϫ oversampling.
7. ± 3 V or ± 1 mA output capability.
8. THD + Noise and SNR are 100% tested.
9. Pin-compatible with AD1856 & AD1860 PCM audio DACs.
REV. A
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
Fax: 617/326-8703



Analog Devices Semiconductor Electronic Components Datasheet

AD1861 Datasheet

16-Bit/18-Bit/ 16 X Fs PCM Audio DACs

No Preview Available !

AD1861 pdf
AD1851/AD1861–SPECIFICATIONS (TA @ +25؇C and ؎5 V supplies, unless otherwise noted)
DIGITAL INPUTS
VIH
VIL
IIH, VIH = VL
IIL, VIL = 0.4
ACCURACY
Gain Error
Midscale Output Voltage
DRIFT (0°C to +70°C)
Total Drift
Bipolar Zero Drift
SETTLING TIME (To ± 0.0015% of FSR)
Voltage Output
6 V Step
1 LSB Step
Slew Rate
Current Output
1 mA Step 10 to 100 Load
1 kLoad
OUTPUT
Voltage Output Configuration
Bipolar Range
Output Current
Output Impedance
Short Circuit Duration
Current Output Configuration
Bipolar Range (± 30%)
Output Impedance (± 30%)
POWER SUPPLY
Voltage
+VL and +VS
–VS
TEMPERATURE RANGE
Specification
Operation
Storage
WARM-UP TIME
Specifications subject to change without notice.
Min Typ Max
2.0 +VL
0.8
1.0
–10
±1
± 10
± 25
±4
1.5
1.0
9
350
350
؎2.88
±8
± 3.0
0.1
Indefinite to Common
± 1.0
1.7
؎3.12
4.75
–5.25
0
–25
–60
1
+25
5.25
–4.75
+70
+70
+100
Units
V
V
µA
µA
%
mV
ppm of FSR/°C
ppm of FSR/°C
µs
µs
V/µs
ns
ns
V
mA
mA
k
V
V
°C
°C
°C
min
–VS 1
DGND 2
+VL 3
NC 4
16-BIT
LATCH
SERIAL
INPUT
REGISTER
CLK 5
LE 6
CONTROL
LOGIC
DATA 7
NC 8 AD1851
16-BIT
DAC
IOUT
16 +VS
15 TRIM
14 MSB ADJ
13 IOUT
12 AGND
11 SJ
10 RF
9 VOUT
NC = NO CONNECT
AD1851 Functional Block Diagram
–VS 1
DGND 2
+VL 3
NC 4
16-BIT
LATCH
SERIAL
INPUT
REGISTER
CLK 5
LE 6
DATA 7
CONTROL
LOGIC
NC 8 AD1851
16-BIT
DAC
IOUT
16 +VS
15 TRIM
14 MSB ADJ
13 IOUT
12 AGND
11 SJ
10 RF
9 VOUT
NC = NO CONNECT
AD1861 Functional Block Diagram
–2– REV. A



Analog Devices Semiconductor Electronic Components Datasheet

AD1861 Datasheet

16-Bit/18-Bit/ 16 X Fs PCM Audio DACs

No Preview Available !

AD1861 pdf
AD1851
RESOLUTION
TOTAL HARMONIC DISTORTION + NOISE
0 dB, 990.5 Hz
AD1851N-J, R-J
AD1851N, R
–20 dB, 990.5 Hz
AD1851N-J, R-J
AD1851N, R
–60 dB, 990.5 Hz
AD1851N-J, R-J
AD1851N, R
D-RANGE* (With A-Weight Filter)
–60 dB, 990.5 Hz AD1851N, R
AD1851N-J, R-J
SIGNAL-TO-NOISE RATIO
MAXIMUM CLOCK INPUT FREQUENCY
ACCURACY
Differential Linearity Error
MONOTONICITY
POWER SUPPLY
Current
+I
–I
Power Dissipation
AD1861
RESOLUTION
TOTAL HARMONIC DISTORTION + NOISE
0 dB, 990.5 Hz
AD1861N-J, R-J
AD1861N, R
–20 dB, 990.5 Hz
AD1861N-J, R-J
AD1861N, R
–60 dB, 990.5 Hz
AD1861N-J, R-J
AD1861N, R
D-RANGE* (With A-Weight Filter)
–60 dB, 990.5 Hz AD1861N, R
AD1861N-J, R-J
SIGNAL-TO-NOISE RATIO
MAXIMUM CLOCK INPUT FREQUENCY
ACCURACY
Differential Linearity Error
MONOTONICITY
POWER SUPPLY
Current
+I
–I
Power Dissipation
*Tested in accordance with EIAJ Test Standard CP-307.
Specifications subject to change without notice.
REV. A
Min
88
96
107
12.5
Min
88
96
107
13.5
–3–
Typ
0.003
0.004
0.009
0.009
0.9
0.9
110
± 0.001
14
10.0
–10.0
100
Typ
0.003
0.004
0.009
0.009
0.9
0.9
110
± 0.001
15
10.0
–10.0
100
AD1851/AD1861
Max Units
16 Bits
0.004
0.008
0.016
0.040
1.6
4.0
%
%
%
%
%
%
dB
dB
dB
MHz
% of FSR
Bits
13.0
–15.0
mA
mA
mW
Max
18
0.004
0.008
0.016
0.040
1.6
4.0
13.0
–15.0
Units
Bits
%
%
%
%
%
%
dB
dB
dB
MHz
% of FSR
Bits
mA
mA
mW




Part Number AD1861
Description 16-Bit/18-Bit/ 16 X Fs PCM Audio DACs
Maker Analog Devices
Total Page 12 Pages
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